Seven times Seven

It started with an email. As if Anne's life wasn't messed up enough already, some creep sends her pictures of empty coffins. Seven of them. Then it started. A woman appeared. Then a man. The coffins were being filled one by one. Every seven hours, the pattern repeated like clockwork. And the clock was ticking. Antwerp police pull out all the stops in a nerve-wracking race against time. Who was behind the kidnappings and why? What could these people possibly have done to deserve their fate? And what did it all have to do with Inspector Anne Verelst?